CVE-2023-42881 – This is a memory corruption vulnerability in ma... (How to Fix)

Q: What is the severity of CVE-2023-42881?

CVE-2023-42881 has a CVSS score of 7.8 (HIGH). This is a memory corruption vulnerability in macOS that could allow an attacker to execute arbitrary code or cause application crashes by processing a malicious file. It affects macOS systems before Sonoma 14.2. Users who open untrusted files are at risk.

📋 TL;DR

This is a memory corruption vulnerability in macOS that could allow an attacker to execute arbitrary code or cause application crashes by processing a malicious file. It affects macOS systems before Sonoma 14.2. Users who open untrusted files are at risk.

💻 Affected Systems

Products:

macOS

Versions: All versions before macOS Sonoma 14.2

Operating Systems: macOS

Default Config Vulnerable: ⚠️ Yes

Notes: Affects all macOS installations before the patched version

📦 What is this software?

Macos by Apple

macOS is Apple's desktop and laptop operating system powering Mac computers used by millions of professionals, developers, creative professionals, and enterprise users worldwide. Built on a Unix foundation with the Darwin kernel and modern Cocoa frameworks, macOS delivers a seamless ecosystem integr...

Learn more about Macos →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Full system compromise with attacker gaining root privileges and persistent access

🟠

Likely Case

Application crash (denial of service) or limited code execution in user context

🟢

If Mitigated

No impact if patched or if untrusted files are not processed

🌐 Internet-Facing: MEDIUM - Requires user interaction to open malicious file from internet

🏢 Internal Only: MEDIUM - Could be exploited via internal file shares or phishing

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Requires user to open a malicious file; no known public exploits

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: macOS Sonoma 14.2

Vendor Advisory: https://support.apple.com/en-us/HT214036

Restart Required: Yes

Instructions:

1. Open System Settings 2. Click General 3. Click Software Update 4. Install macOS Sonoma 14.2 or later 5. Restart when prompted

🔧 Temporary Workarounds

Avoid untrusted files

all

Do not open files from untrusted sources

Use application sandboxing

all

Run applications in sandboxed environments when possible

🧯 If You Can't Patch

Implement application allowlisting to restrict which applications can run
Use endpoint detection and response (EDR) tools to monitor for suspicious file processing

🔍 How to Verify

Check if Vulnerable:

Check macOS version in System Settings > General > About

Check Version:

sw_vers

Verify Fix Applied:

Verify macOS version is 14.2 or later

📡 Detection & Monitoring

Log Indicators:

Application crashes related to file processing
Unexpected process termination in system logs

Network Indicators:

File downloads from suspicious sources followed by application crashes

SIEM Query:

source="macos_system_logs" AND (event="crash" OR event="termination") AND process="*" AND file_extension="*"

📊 Metadata

CVE ID: CVE-2023-42881

CVSS v3 Score: 7.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE: CWE-119

Published: January 23, 2024

Last Updated: November 4, 2025

🔗 References

https://support.apple.com/en-us/HT214036 Release Notes,Vendor Advisory
https://support.apple.com/en-us/HT214036 Release Notes,Vendor Advisory
https://support.apple.com/kb/HT214036

📤 Share & Export

📄 Export Markdown 📋 Export JSON

🔗 Related Vulnerabilities

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